The Otter Box^TM was built to keep items dry.
The closed cell neoprene o-ring creates a positive seal which does not allow waterin. The boxes we tested off the coast of Alaska reached depths well beyond 100 feet without leaking. Independent tests, as well as our own, have consistently shown that all sizes of the Otter Box are leak proof to at least a depth of 110 feet.

We understand that most of you will never use a box to this depth, but it gives us the confidence to sell you a watertight box with a lifetime guarantee. Any time that you are around water, you can trust that you items will be kept dry.

The Otter Box^TM is watertight to depths well beyond 100 feet.